On Sat, Feb 28, 2009 at 2:34 PM, Ihno Krumreich <i...@suse.de> wrote:
> So to submit more than one request at a time to the same disk there > is only the possibility with PAV. Would it not be the multi-path feature in Linux that allows Linux to see multiple exposures and an I/O outstanding to each exposure. PAV is what you need on LPAR to do this. With z/VM you can give the virtual machine multiple links to the same mini disk to simulate this. Whether that makes sense from a performance point of view depends on your configuration. With MDC in the picture, you can show cases where this works well. I have not been able to measure a configuration where z/VM uses PAV to back this. I have seen quite a few where it really made no sense at all. Rob -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
